powerpc/8xx: Fix permanently mapped IMMR region.

static unsigned long block_mapped_ram;

/*

 * Return PA for this VA if it is in an area mapped with LTLBs.

 * Return PA for this VA if it is in an area mapped with LTLBs or fixmap.

 * Otherwise, returns 0

 */

phys_addr_t v_block_mapped(unsigned long va)

{

	unsigned long p = PHYS_IMMR_BASE;

	if (__map_without_ltlbs)

		return 0;

	if (va >= VIRT_IMMR_BASE && va < VIRT_IMMR_BASE + IMMR_SIZE)

		return p + va - VIRT_IMMR_BASE;

	if (__map_without_ltlbs)

		return 0;

	if (va >= PAGE_OFFSET && va < PAGE_OFFSET + block_mapped_ram)

		return __pa(va);

	return 0;

}

/*

 * Return VA for a given PA mapped with LTLBs or 0 if not mapped

 * Return VA for a given PA mapped with LTLBs or fixmap

 * Return 0 if not mapped

 */

unsigned long p_block_mapped(phys_addr_t pa)

{

	unsigned long p = PHYS_IMMR_BASE;

	if (__map_without_ltlbs)

		return 0;

	if (pa >= p && pa < p + IMMR_SIZE)

		return VIRT_IMMR_BASE + pa - p;

	if (__map_without_ltlbs)

		return 0;

	if (pa < block_mapped_ram)

		return (unsigned long)__va(pa);

	return 0;